Combined coating chipper and filament cutter



Feb. 2, 1960 F. J. ZOSCHG I 2,923,189

COMBINED COATING CHIPPER AND FILAMENT CUTTER Filed Feb. 28. 1956 72 g l I H iv," /i! 32 I 50 8 INVENTOR 52 54 42 FRANK a. ZOSCHG 4o BY I |E -4 1 ATTORNEY fli States Patent 2,923,189 H COMBINED COATING CHIPPER AND FILAMENT CUTTER Frank J. Zoschg,, Sinne rnahoning, Pa., assignor, by mesne assignments, to Sylvania Electric Products Inc., Wiliningto'n, DeL, a corporation of Delaware Application February 28, 1956, Serial No. 568,398 7 Claims. (c1. 81-951) This invention relates to winders, such as are used in the radio tube manufacturing industry to wind insulated or coated filaments which may subsequently be inserted within cathode sleeves.

In particular the invention relates to an adjunctive portion of the winder which serves to remove coating material from adjacent the ends of a wound filament to enable the filament to be facilely attached to lead in wires of an electron tube stem.

In many applications the filament wire is very fine while the coating is fairly thick and White. Therefore, where the extreme end of the wire is left coated with the bare portion of the wire spaced from that extreme end, it is easier to manipulate the filament, as by grasping the free, White-coated ends with tweezers, to effect weld ing of the bare wire to a lead in. Previously the removal of coating was effected by hammering the same adjacent the unsupported ends of the filament. bent filament ends which by entanglement with other filaments in a pile made subsequent handling of the filaments more difiicult besides resulting in some losses of filaments by undesired bending of the filaments or undesired breaking otf of coating.

It is an object of this invention to provide a simple means for removing the coating of insulated filaments adjacent the ends of the filaments, even though on the winder, the filament ends are in offset relationship.

It is another object to provide means for removing the coating of insulated filaments adjacent the ends of the filaments while yet maintaining the very ends of the wire coated and in unbent condition.

Other objects will become apparent upon consideration of the following specification when taken in conjunction with the accompanying drawing in which:

Fig. 1 is a view of the coated filament after formation thereof.

Fig. 2 is a perspective view of a coating breaker and filament cutter with the winder shown in diagrammatic form.

Fig. 3 is a diagrammatic front view of the cutter and breaker, with parts separated.

Fig. 4 is a similar view but showing the parts in closed position and with cut off wire ends.

Fig. 5 is a perspective view of a cutter block and a spacer bar in exploded relationship and Fig. 6 is an end view of the cutter bar seat showing a sectioned arm of the coating breaker extending through the back wall of the seat.

Referring to the drawing in greater detail, at 10 there is disclosed a table above which is a conventional coated This resulted in Patented Feb. 2, 1960 secured thereto a horizontal breaker "supporting arm 18, while the shaft 16 has secured thereto a horizontal anvil supporting arm 20. The forward end of arm 20 is formed into a saddle 22 within which is seated a hard steel anvil block 24. The saddle is defined by a bottom wall 26, two side walls 28 and a back plate 30 secured to the bottom wall by bolts 32 passing through the plate and threaded into the bottom wall. The block is held to the saddle by a socket headed bolt 34 passing through the block and also threaded into the bottom wall'of the saddle. The front end of the anvil block is stepped to provide two parallel offset faces 36 and 38 with the face 38 lying inward of the face 36 and closer to the shaft 16 than the face 36. The faces 36 and 38 however, both project beyond the edge of bottom 26.

The breaker support arm is provided at its free end with a saddle 40 provided by thinning the arm 18 at its end and recessing the thinned end. Fastened to the bottom wall of the saddle 40 is a cutter block 42. The forward edge of the cutter block has two offset parallel faces 44 and 46 complementary to the faces 36 and 38 on the anvil, the top surface of the block and the front faces providing cutting edges 48 to cooperate with corresponding edges on the cutting anvil 24. As seen in Fig. 4, when the. cutter block and anvil are brought together the ends of the coated filament 47 will be clipped off. To guide the parts into proper relationship, the block 42 is provided with a tongue beveled at the free end to slide between the free ends of the filament and under the cutter anvil 24. The offset faces are provided in order that cutting off of the filament ends may be effected without bending of the filament, since the filament itself, when wound, provides free ends on different sides of the winder head.

Surmounting the cutter block is a spacer bar 52 set in from the cutting edges of the block 42. This spacer bar and block 42 are conveniently fastened to the bottom wall of the saddle 40 by screws 54 passing through.the saddle and block 42 and threaded into the spacer bar. Slidable on the spacer bar is a coating breaker hammer 56, the hammer being guided in its sliding movement by a bolt and slot connection 58, 60 and a rearwindly extending arm 62 slidable in a slot 64 in a back plate 66 fastened to the saddle 40. .The bolt 58 may be a To hold the lower free ends of the wire against bending filament winder 12 such as are shown in the patents to Kinyon 2,241,602 La France 2,380,320 or Schneider et al. 2,448,916.

Journalled on the table and oscillatable in synchronism with the operation of the winder is a pair of vertical hammer and anvil supports by hand, The shaft 14 has,-

socket head type of bolt threaded into the bottom of the saddle 40. The hammer is urged to an advanced position by a pair of springs 68 reacting between the hammer and back plate 66. To limit the advance move-' ment of the hammer and align the front edge as desired with the front edges of the cutter bar, the arm 62 is integrally formed with a cross bar 70 straddling the back of theplate 66 and provided with adjustment screws 72 butting against the back of the plate 66. The forward edge of the hammer is provided with offset faces 74, 76

complementary to the faces 36 and 38 but of a height less than the height of the faces 36 and 38, as seen in Fig. 4, to leave as much coating material on the extreme free ends 77 of the filament as may be desired. These. H faces 74 and 76 in cooperation with faces 36 and 38 will chip off the coating of wire near the ends thereof.

when this chipping olf operation is taking'place, the

under forward portion of the hammer is coated with a resilient member 80, such as rubber, the outer face of which conforms with the faces 74-and 76, though recessed inwardly from the faces to allow for the thickness of the coating on the filament. The thickness, vertically of the resilient member is slightly less than the height of the spacer bar 52 to-provide for non-friction of the rubber 80 on the upper surface of cutter block 42 while its width is such as to enable movement thereof toward"-' .the forward edge ofspacer bar 52..

In use, both arms 18 and 20 will be swung toward each other so that they both approach the free ends of the filament 47. The anvil faces 36, 38 and hammer faces 74 and 76 strike the coating on the wire and chip thesame away and, as the hammer moves in, the resilient cushioning member 89 embraces the lower portion, of the wire and prevents-it from bending. Continued movement of arm 13 against resistance of springs 68, when the hammer is against the filament, causes the cutter block to cooperate with the cutting edge on the anvil block to snip off the lower ends of the filament.

Having described the invention, what is claimed as new is:

l-. An apparatus for chipping coating off the surface of a flexible body comprising a table, an anvil movably mounted on saidtable, a hammer also mounted on the table and movable toward and from the anvil, said hammer having a face cooperating with the anvil, said hammer having a second face intersecting the first face, resilient material on said second face, said material terminating close to the first face of said hammer, said anvil having a portion opposed to the first face on the hammer, and opposite said flexible body and in a plane parallel to the first face. i

2. An apparatus for chipping coatings off the surface of a flexible body comprising table, an anvil mounted on said table, a hammer, an arm mounted on the. table and supporting the hammer, said hammer having a face cooperating with the anvil, said hammer having a second face intersecting the first face, resilient material on said. second face, said material. terminating close to the first face of said hammer, said anvil having a portion opposed to the first face on the hammer and cooperating with said flexible body and in a plane parallel to' the first.

face,-a cutter rigidly fixed to the anvil and a seeoiid cooperating cutter on the arm and with respect to which the hammer is resiliently slidably held with its" face beyond the second cutter.

3. In an apparatus for chipping coatings from off a wound filament adjacent anend thereof, a table, an anvil mounted on said table and adapted to engage oneside of said filament adjacent to but removed from the end thereof, a hammer also mounted on said table and cooperative with saidanvil adapted to engage the'oppos'i'te side of said filament, the extent of the face of said anvil along" the length of the filament being less than the corresponding extent of the hammer, the upper edges of the hammer'and anvil being at substantially the same elevation with respect to the filament when the two areclosed on the filament, and a resilient memberfattached to the under face'of the hamnierand cooperating with the face of the anvil to restrain the free end or the filament while the anvil and hammer remove the coating from the filament adjacent the end thereof.

4. In apparatus for removing coating from adjaceiit filament ends and cutting oli ends of the filament, a table, an anvil mounted on the table and having annment coating engaging face and a cutting edge, a harnmer mounted on the table and cooperative with the anvil and having a filament coating engaging face, a cutter block having an edge movable into cooperation with the cutting edge of the anvil to effect cutting action on the filament, aspacer onthe'cutter block, the hammer being mounted on said spacer and slidable towardand from the cutting edge of the cutter block, a resilient means mounted on the hammer close to the forward edge thereof andof a thickness to nearly fill the space:

between the cutter block and hammer, and spring'meanis to urge the hammer to an advanced position withrespect,

to the cuttingedge of the; block to effect a' chipping: of v the'coating prior to filament cutting on approach movement of the' anvil and cutter block toward each other,-

the filament engaging face of the anvil being substantially coextensive in height with the height of the; face of the hammer and the thickness of the resilient material.

apparatus for removing coating material from a coated filament at areas close to but removed from the ends of the filament wherein the filament ends are adjacent each other and for cutting oif the ends of the filament while yet leaving coated portions on the filament ends, a table, an anvil mounted on said table and having a filament engaging face of a height equal to the length of coating material to be removed, a hammer mounted onsaid table and having a; face to contact the filament on approach movement of the hammer to the anvil, said hammer face being of smaller height than the anvil face but arranged with the upper edge of the face of the hammer at the same level as'the upper edge of the face of the anvil, a resilient member secured to the under face of the hammer and extending close to the filament engaging face of the hammer, the height of said hammer face plus the height of the resilient member being substantially equal to the height of the anvil face, a filament cutter portion rigid with the anvil, a support movable toward and from the anvil, a cooperating cutter portion below the hammer mounted on the support, said hammer being slidably mounted on the support, means for guiding:

the hammer in its sliding movement comprising a back plate extending up from the support, said back plate being provided with a vertical slot, a rearwardly extending' arm fast with the hammer slidably traversing said slot, resilient means urging said hammer away from the back plate, a cross-bar fast with the arm and extending across the back of said plate, and adjusting screws extending through. the cross bar and adapted to engage thebaclt of said plate to determine the farthermost posi'-, tion of the hammer face when the hammer is urged forwardly by the resilient means.

6. In an apparatus for chipping coatings sirnultaneously off both ends of a' helically woundflexible coated wire, adjacent the ends thereof, where the ends are adjacently arranged but on opposite sides of the wound ,coil, 21 table, an anvil mounted on the table adapted to be normally positioned to one side of one end of the coated Wire and provided with a stepped face to engage said side of said one end of the wire and the corresponding side of the second'end of the wire and a hammer mounted on the table adapted to be normally positioned on the opposite side of the opposite coated end of the Wire, said hammer having a complementary stepped face engaging the opposite sides of the ends of thecoated wire.

7. In an apparatus for chipping coatings simultaneously off both ends of a helically wound flexiblecoated wire, adjacent the ends thereof, where the ends are adjacently arranged but on opposite sides of thqwound coil, a table, an anvil mounted on the table adapted to be normally positioned to one side of onelend of the coated wire and providedwith a stepped face to engage said side of saidone end of the wire and the corresponding side of the second end of the wire and also provided with a lower guiding edge, a hammer mounted on the table adapted to be normally positioned on the opposite side of the opposite coated end of the wire, said hammer having a complementary stepped face engaging the opposite sides of the ends ofthe coated wire, and a guide tongue on the hammer positioned between the stepped faces thereof and adapted m1 engage the lower guiding edge of the anvil on approach movement ,of'the hammer and anvil, said tongue being positioned 1,823,4l3 Holmes Oct. 2 011 931 1,998,391 Shaw Apr. 16, 2,133,005 Wollenweber Oct. 11, 1 938 2,434,591 Schaefr Jan. 13,194? 2,475,056 Schwartz July 5, 19 49 2,521,688 Cata-Ido Sept. 12, 1 950 2,539,776 Gordon Jan. 30, 1951 

